http://www.oercommons.org/ -
OER Commons provides links to free use teaching
and learning content from around the globe.
Reference materials, courses, and open textbooks
for K – 12 and college courses are available to
users free of charge.

www.curriki.org
– Curriki is a free
non-profit K-12 open curricula community that
allows educators, parents and students to create
and share open learning resource curricula.
There are full courses, exercises.